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731395.fig.002b
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731395.fig.002d
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Figure 2: Representative T2-weighted sagittal MRI of the nucleus pulposus at the 56-day time point shows lower signal intensity in model group (b) and EA group (c) than the control group (a). (d), (e), and (f) are the corresponding MRI axial scan, respectively, to (a), (b), and (c). Different signal intensity in the disc is depicted with arrows. Change in disc degeneration of four groups (g). Pfirrmann’s classification based on disc height and signal intensity from grade 1 to 5 was used to grade the disc degeneration of the rabbit discs. Data are expressed as the mean ± SD (ANOVA); , compared with the control group; , compared with sham compressed group; , compared with the model group on 56 days and compared with 28 days in EA group.